Improvement in thrashing-cylinders



H. MOORE;

Improvement in Thrashing-Cylinders. No. 129,245, Patentedluly 16,1872..-

'WZZneJ'JEJ X lnvezz/ior:

4/. FHDTDi/T-MERI Him :0. MY. [0590/21/55 PROCESS) UNITED STATES PATENTCFFIOE.

HIRAM MOORE, OF GREEN LAKE, WISCONSIN.

IMPROVEMENT iN THRASHING-CVLINiJERS.

Specification forming part of Letters Patent No. 129,245, dated July 16,1872.

To all whom it may concern:

Be it known that I, HIRAM MOORE, of the town and county of Green Lakeand State of Wisconsin, have invented certain Improvements inThrashing-Oylinders, of which the following is a specification:

The object of my invention is to secure a thrashing-cylinder which shallbe cheap to construct, durable and emcient in operation, readilyadjusted, put together or taken apart, and the diameter of which may beincreased without materially adding to its weight.

These objects I attain by constructing my cylinder of independent teethclamped upon a central shaft.

The accompanying drawing shows so much only of my improvement as isnecessary to illustrate the subject-matter herein claimed.

Figure lrepresents a side elevation ofmy improved cylinder with teeth ofvarious forms secured in working position, and Fig. 2 an end View of thesame. Fig. 3 represents a longitudinal central section through thecylinder, showing the teeth in one vertical plane in order to representtheir various forms in one view.

The teeth are, by preference, out out of sheet-steel (their length beingequal to the radius of the cylinder) of the form shown in thedrawing-that is, wide at the base so as to be rigid transversely, andtapering toward the ends to insure lightness. They may also becorrugated longitudinally, as shown in the drawing, to give greaterstiffness. This mode of construction insures lightness and strength aswell as economy of material.

The shaft A is provided with anut or shoulder, a. The teeth areperforated and slipped on the shaft. Perforated washers or blocksrelatively to the others.

B of proper width are interposed between the teeth, and the teeth andwashers are firmly clamped together on the shaft by a nut, a. Whereradial teeth 13 are used they may be turned on the shaft into anydesired position Where diametrical teeth-plates (l are used they may bebent, as at c, to insure the proper relation to the teeth of theconcave. A braced tooth, E, is also shown as constructed of two plateswith a block interposed, the plates being bent and riveted together onopposite sides of the shaft. The cylinder may be perfectly bal anced by"turning the teeth into the proper relation, and its diameter obviouslymay be increased by lengthening the teeth with but a slight increase inweight. It may be driven at a high speed without danger of bursting orbreaking the cylinder, and should the teeth strike a rigid obstacle theywould turn on the shaft and thus prevent breakage.

1 claim as my invention- 1. A thrashing-cylinder tooth, B B constructedof sheet-metal, with a broad base to secure strength, and taperingtoward its point to insure lightness and economy, and appliedsubstantially as set forth.

2. The longitudinally-corrugated sheet-meta1 tooth B constructed as setforth.

3. The tooth-plate O, bent as described t strike different spaces in theconcave.

4. The braced teeth E, constructed as set forth.

In testimony whereof I have hereunto subscribed my name.

. HIRAM MOORE. Witnesses:

E. O. DAVIDSON, EDM. F. BROWN.

